GPRS is a packet data communications system integrated with the GSM cellular telephone system. Standardized by ETSI in December 1997, GPRS products are currently under development by GSM equipment vendors. GPRS is a large, complex system that merges cellular telephone radio transmission technology and Internet information delivery protocols. Initial implementations of GPRS will operate within the framework of present GSM technology. It is also anticipated that GPRS will be adapted for use in North American TDMA cellular systems and enhanced TDMA cellular systems (EDGE).
The GPRS specification admits considerable flexibility in the design of network elements and in network operation. The values assigned to a large set of parameters influence many performance characteristics including the relationship of GPRS data transmissions to GSM telephone traffic, the relationship of uplink data traffic to downlink data traffic, and the proportion of resources devoted to signaling and user data.
WINLAB has been studying GPRS for more than two years. An article published in the IEEE Communications Magazine in October 1997 continues to attract a lot of attention throughout the wireless communications community. The basis of WINLAB research is a simulation created within the OPNET software system. Over the past year, the simulator has been extended to cover both the downlink and uplink of a GPRS system. Recent research explores the interaction of information source characteristics with performance of the four GPRS coding schemes.
In response to a large number of queries about our research on the the new General Packet Radio Service, WINLAB held a one-day seminar at Rutgers University on February 22, 1999. Experts were invited to learn the latest results of WINLAB research, exchange views, and set a research agenda for the future. To view the presentations given at the seminar, click here .
The seminar was covered by Elizabeth Mooney of RCR Magazine. You can view the article here: